1 files changed, 19 insertions, 6 deletions

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index dcf5f86461f7..828b329e08e0 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -62,7 +62,9 @@ static void rtc_uie_task(struct work_struct *work)
         int err;
 
         err = rtc_read_time(&rtc->class_dev, &tm);
-        spin_lock_irq(&rtc->irq_lock);
+
+        local_irq_disable();
+        spin_lock(&rtc->irq_lock);
         if (rtc->stop_uie_polling || err) {
                 rtc->uie_task_active = 0;
         } else if (rtc->oldsecs != tm.tm_sec) {
@@ -75,11 +77,11 @@ static void rtc_uie_task(struct work_struct *work)
         } else if (schedule_work(&rtc->uie_task) == 0) {
                 rtc->uie_task_active = 0;
         }
-        spin_unlock_irq(&rtc->irq_lock);
+        spin_unlock(&rtc->irq_lock);
         if (num)
                 rtc_update_irq(&rtc->class_dev, num, RTC_UF | RTC_IRQF);
+        local_irq_enable();
 }
-
 static void rtc_uie_timer(unsigned long data)
 {
         struct rtc_device *rtc = (struct rtc_device *)data;
@@ -215,7 +217,7 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
         struct rtc_wkalrm alarm;
         void __user *uarg = (void __user *) arg;
 
-        /* check that the calles has appropriate permissions
+        /* check that the calling task has appropriate permissions
          * for certain ioctls. doing this check here is useful
          * to avoid duplicate code in each driver.
          */
@@ -239,10 +241,10 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
 
         /* avoid conflicting IRQ users */
         if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) {
-                spin_lock(&rtc->irq_task_lock);
+                spin_lock_irq(&rtc->irq_task_lock);
                 if (rtc->irq_task)
                         err = -EBUSY;
-                spin_unlock(&rtc->irq_task_lock);
+                spin_unlock_irq(&rtc->irq_task_lock);
 
                 if (err < 0)
                         return err;
@@ -300,6 +302,17 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
 
                 err = rtc_set_time(class_dev, &tm);
                 break;
+
+        case RTC_IRQP_READ:
+                if (ops->irq_set_freq)
+                        err = put_user(rtc->irq_freq, (unsigned long *) arg);
+                break;
+
+        case RTC_IRQP_SET:
+                if (ops->irq_set_freq)
+                        err = rtc_irq_set_freq(class_dev, rtc->irq_task, arg);
+                break;
+
 #if 0
         case RTC_EPOCH_SET:
 #ifndef rtc_epoch